If you have Public Folders set to favorites and set Outlook to download public folder favorites, it takes an insane amount of time to do the initial download and Outlook will often say it's not responding.
#OUTLOOK 2016 INDEXING STUCK UPDATE#
I have also tried doing Send / Receive - Update Folder but this gets stuck on Synchronizing Hierarchy and does nothing. In Outlook itself, the status is Updating Inbox but its not doing anything - it's hanging. However when a user logs onto another machine they are able to send emails fine or if they log in to OWA they have no problems either. Emails can't be received and can't be sent.
In the past couple of days I have had an issue which has appeared on again with some users' Outlook.